Patents by Inventor Betty P. L. Wen

Betty P. L. Wen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4937061
    Abstract: Continuous production of aluminum hydroxycarbonate gel by continuous reaction of aluminum salt solution with mixed alkaline carbonate and bicarbonate solution under homogeneous conditions in a relatively small reaction vessel, and continuing the reaction in a subsequent reaction vessel under controlled pH. The product gel is separated from the non-aluminum cation containing reaction mixture within less than about 6 hours, whereby formation of poorly soluble addition reaction products such as dihydroxy aluminium sodium carbonate, which contribute undesired non-aluminum cations to the gel product, is reduced. The aluminum salt solution is adjusted in pH by adding to it a portion of the mixed carbonate and bicarbonate solution to obtain a clear solution of pH 3.5 to 4.0. This results in a smooth, creamy gel with less objectionable chalky mouth feel.
    Type: Grant
    Filed: November 23, 1987
    Date of Patent: June 26, 1990
    Assignee: Warner-Lambert Company
    Inventors: Betty P. L. Wen, Arthur P. G. Wright, Eric Blaser, Suhas H. Ambike
  • Patent number: 4882324
    Abstract: Essentially pure acid hydroxyl ligand aluminum complexes useful as antacids are prepared by first reacting an acid hydroxyl ligand with an aluminum alkoxide under anhydrous conditions to form an intermediate and further reacting the intermediate with water, these complexes are useful as antacids and as such in the treatment of hyperacidity.
    Type: Grant
    Filed: June 2, 1988
    Date of Patent: November 21, 1989
    Inventors: Arthur P. G. Wright, Betty P. L. Wen, Terry G. Schenck, Antonina Maron
  • Patent number: 4842734
    Abstract: Essentially pure acidic amine ligand aluminum complexes useful as antacids are prepared by first reacting an acidic amine ligand with an aluminum alkoxide under anhydrous conditions to form an intermediate and further reacting the intermediate with water, these complexes are useful as antacids and as such in the treatment of hyperacidity.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: June 27, 1989
    Assignee: Warner-Lambert Company
    Inventors: Arthur P. G. Wright, Betty P. L. Wen, Terry G. Schenck, Antonina Maron
  • Patent number: 4772724
    Abstract: Essentially pure acid hydroxyl ligand aluminum complexes useful as antacids are prepared by first reacting an acid hydroxyl ligand with an aluminum alkoxide under anhydrous conditions to form an intermediate and further reacting the intermediate with water, these complexes are useful as antacids and as such in the treatment of hyperacidity.
    Type: Grant
    Filed: December 2, 1986
    Date of Patent: September 20, 1988
    Assignee: Warner-Lambert Canada Inc.
    Inventors: Arthur P. G. Wright, Betty P. L. Wen, Terry G. Schenck, Antonina Maron
  • Patent number: 4766216
    Abstract: Essentially pure acidic amine ligand aluminum complexes useful as antacids are prepared by first reacting an acidic amine ligand with an aluminum alkoxide under anhydrous conditions to form an intermediate and further reacting the intermediate with water, these complexes are useful as antacids and as such in the treatment of hyperacidity.
    Type: Grant
    Filed: December 2, 1986
    Date of Patent: August 23, 1988
    Assignee: Warner-Lambert Company
    Inventors: Arthur P. G. Wright, Betty P. L. Wen, Terry G. Schenck, Antonina Maron